Reland "UserSessionManager trigger tpm initialization whenever TPM is enabled."

This is a reland of f5684467

Original change's description:
> UserSessionManager trigger tpm initialization whenever TPM is enabled.
>
> we are obsoleting `TpmIsBeingOwned()`, which is not really necessary
> anyway; even if `TpmIsBeingOwned()` returns `true`, triggering the TPM
> initilaization again is just no-ops at ChromeOS side.
>
> BUG=b:172775884
> TEST=TBD if untitests needed.
>
> Change-Id: If4240a0c8a9a7485d77856e1e5c346c89407c09a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2532155
> Commit-Queue: Leo Lai <cylai@google.com>
> Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#826306}

Bug: b:172775884
Change-Id: I0499d47b9962f41bcfa956d6efa73b850a0b2021
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2534372Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: Leo Lai <cylai@google.com>
Cr-Commit-Position: refs/heads/master@{#827141}

chrome/browser/chromeos/login/session/user_session_manager.cc

@@ -1544,7 +1544,7 @@ void UserSessionManager::CompleteProfileCreateAfterAuthTransfer(
 void UserSessionManager::PrepareTpmDeviceAndFinalizeProfile(Profile* profile) {
   BootTimesRecorder::Get()->AddLoginTimeMarker("TPMOwn-Start", false);
 
-  if (!tpm_util::TpmIsEnabled() || tpm_util::TpmIsBeingOwned()) {
+  if (!tpm_util::TpmIsEnabled()) {
     FinalizePrepareProfile(profile);
     return;
   }